Prison door



(No Model.)

' J. W MULLINS.

AND WINDOW.

PRISON DOOR, CELL,

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UNITED STATES PATENT OFFICE.

JOHN W. MULLINS, OFLONDON, KENTUCKY.

PRISON DOOR, CELL, AND wmoow.

SPECIFICATION forming part of Letters Patent No. 367,832, dated August 9 1887,

Application filed May 25,1887.

To all whom it may concern;

Be it known that I, JOHN W. MULLINS, a citizen of the United States, residing at London,in the county of Laurel, State of Kentucky, have invented certain new and useful Improvements in Prison Doors, Cells, and WVindows, of which the following is a specification, reference being had therein to the accompauying drawings.

This invention relates to improvements in walls, windows, and doors for jails and prisons, wherein light and a free circulation of air are desirable without permitting of sight or vision through the sameand the passage therethrough of tools from the outside by accomplices, whereby the person incarcerated would be enabled to make his escape.

The objects and advantages of the invention will hereinafter appear, and the novel features thereof be particularly pointed out in the claims.

Referring to the drawings, Figure I is a front elevation of a window of a jail constructed in accordance with my invention.

Fig. 2 is a cross-section of the same on the line 9 y of Fig. 1. Fig. 3 is avertical section on the line :0 :r; and Fig. 4 is a modification hereinafter described.

Similar letters of reference indicate like parts in all'the figures of the drawings.

In carrying out my invention I propose to construct the same either of cast or wrought metal, it being apparent that the plate A may be corrugated, as at A, upon its upper or outer side, and, as at A, upon its under or inner side, either by casting or stamping, as desired. The plate as thus far described may be formed in plates of desired sizes and afterward bolted or otherwise secured together to form continuous walls or partitions.

For the purpose of admitting a free circulation of ,air and also sufficient light'to the interior of the cell, perforations A are formed inthe sides of the corrugations. By reason of the proportion of the openings, their loca Serial No. 239,320. (No model.)

tion, and the thickness of the metal it will be seen that the light will enter, as shown by the'dotted lines 2, will strike against the'op posite side or wall of the next adjacent corrugation, and be deflected into the cell. No direct rays can enter, nor can any tool be passed through the openings of the partitions.

In Fig. 4 I have illustrated a modification of my invention, the same being formed of sheet metal, whereby the construction of the same is greatly simplified and the cost very much reduced. perforate a blank of sheet metal, as shown at the bottom of said Fig. 4, and afterward form the corrugations by passing the sheet through grooved rollers. This latter construction, While not suitable or desirable for strong inclosures-such as jails, prisons, &c. -yet may be used to advantage in the construction of station-houses and other similar structures.

Having described my invention, what I claim is-- 1. Awindow, door, or wall forjails, prisons, 810., consisting of a corrugated plate provided with transverse perforations in the side walls of its corrugations, said walls being substantiall y parallel, properly spaced, and extended beyond the perforations t5 deflect light and air passing thercthrough, substantially as specified.

2. A window, door, or partition for jails, prisons, 850., consisting of a metallic plate having inner and outercorrugations, perfo rated longitudinally, said corrugations and perforations being of such relative proportion as to permit of the free entrance of air and a deflected entrance of light and yet'not permit of a direct vision through the same.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN W. MULLINS.

WVitnesses:

OHAs. SEWELL,

W. R. JONES.

In this instance I propose to 

